Brake construction



June 2l, 1932. w. A. vocK ET AL BRAKE CONSTRUCTION Filed July l2, 1929 'UNIT WILLIAM ARTHUR VOCK, GF LONG BEACH, AND CHARLES E. WOOD, OF LOSNGELES, CALIFORNIA 'f BRAKE CONSTRUCTION Application filed July 12,1929. Serial No. 377,6791j.

This invention relates to a brake construction and relates particularly to a brake construction applicablev to the drum of a Well drilling rig, or the like.

The draw Works of a Well drilling 'rig usually embodies a. Winding drum upon Which the cable used in handling drilling tools, Well casing, etc., is Wound. In the usual arrangement the drum is operated in one direction' by a power drive and in the other direction by the Weight of the parts carried by the cable. The rotation ofthe Winding drum is controlled by one or more manually controlled brakes. YThe common type of brake consists. of a flexible band operable to engage a fiange or rim on the drum. The band is usually provided with a suitable friction lining. The common forms of Winding drum brakes give considerable trouble, one reason being that the lining becomes smooth and slippery and fails to effectively engage or grip the brake flange. Y' Y It is a general object of the invention to provide a dependable, effective brake for the Windingdrum of a Well drilling rig.

Itis another object of the invention to provide a brake construction that can be readily applied to the forms of Winding drums in general use.

Another object of the invention is to provide a brake construction for the Winding drum of a Well drilling rig that embodies an interrupted braking surface.

Itis another object of the invention to provide a brake construction for the Winding drum of a Well drilling rig that embodies a plurality of like units in the form of shoes attached to a flexible band, each unit carrying lining to engage the braking flange of the drum. Y y i It is a further object of the'invent-ion to provide a brake construction of the character ment-ioned in which the shoes are individually` brake construction for the Winding drum of a Well drilling outfit.

The various objects and features of our invention will be best and more'fully under-v stood from lthe 'following detailed description of a typical, preferred form and applica-` tion of the invention, throughout Which description reference is had to the accompany-` ing drawing, in Which: I

Fig. 1 is a front elevation of a'I portion of the dratv Works of a typical Well dri'llingri'g.'` Fi g. 2 is an end vieu7 of the draw Works showing the brake construction provided by this invention embodied in the windingdrum. Fig. 3 is 'anfeiilaroed vertical detailed sectional viewtaken as indicated by line -Son Fig. 1. `F ig. 4 is a'pvertical transverse detailed sectional view taken as indicated byline 'c-i on Fig. 3. F ig. 5 is a vertical longi-` tudinal detailed sectional view ofone'of-the shoes or units, being a vievv taken substantially as indicated by line 5 5 on Figzl. `Fig. 6

is a vertical detailed sectional view ofione of the shoes, being avview taken as indicated' by line 6-`6 on Fig. 5. I tailed sectional view of another form ofthe invention. I

The vbrake construction provided by this invention is particularly adapted to be used in connection with the Winding drum of the draw Works of a Well drilling rig. The invention, hovvever, is suited for use in connection with various devices and isnot to be considered as limited to the particular form and application about to befdescribed, but is tobe understood as including any features that may fall Within the scope of the claims.

ln the accompanying drawing We have illustrated the Ybrake construction provided by this invention applied to the Winding. drum of a typical Well drilling rig. The portion of the Well rig illustrated in the dravving'infV Fig. 7 isa vertical de- Y l so the flange 17 and carrying a plurality of the shoes 19. The shoes 19 provided by this invention are detachably mounted on the inner side of the band 18; A handle or lever 2O Y is connected with the band 18 for operating the band tobring'the shoesj19 into engagement with the flange 17. It is to be understood that the flanges 17 may be provided at both ends of the drum and the vbandssurroundingthe flanges may be connected with a single operating lever.

The brake construction provided by this invention includes, generally, the braking rim or flange 17 carried by the end 16 of the winding drum 14, theflexible band 18 surrounding the flange y17 ,and the spaced shoes 19 detachablyconnectedto the band 18 and adapted to be brought into engagement with the flange 17. Y l. -v

The braking flange 17 .is an vannular membei' adapted tobe applied to or formed on the periphery ofthe end16 of the drum 14. In the construction illustrated an annular recess 21 is provided in the peripheral portion of the 'outer side of the end 16. The recess 21 eX- tends radially inward from the periphery of the end 16 forming A,a shoulder v22. The flange 17 is preferably arranged-so'that it eX- tends axially outward from the end 16 and is immediately beyond the periphery of the end 16, The inner side of the flange 17 is proangularly disposed flat walls or faces 26.*'

The faces 26 extend voutwardly from the center of the groovev 25 to the edges of the flange 17 The band 18 is a flexible member surrounding the flange 17.V The band 18 may be similar to the brake bands in general use. It is sufliciently wide to completely cover the groove 25 and has one end connected to astationary part of the well derrick by means of anchor members 28,7or the like,` and has the other end connected to the operating lever 20. The two ends of the band 18 arel preferably relatively near one another so that the band extends a substantial distance around the flange 17 The band is normally spaced from the periphery of the flange 17 and is operable bythe lever`20 to move the shoes 19 intoengagement withlthe faces 26 of the groove. Y Y

The shoes 19 are mounted on the inner side of the band18. The shoes 19 are spacedcircumferentially on the band and are preferablyalike in formation. Each shoe includes angularly related tozcorrespond to the configuration of the groove 25 in the flange 17 The parts 88'are-joined or connected at the center of the shoe and A'entend to the edges of f the band 18. The parts88 mayextend any desired distance circumferentially along the inner side of the band. `End flanges 84are provided on the frame 80 and extend inwardly from the end edges of the parts 88. The outer edgesy of the end flanges 84 are vpreferably made parallelto the surfaces of the parts .88. The ends 84 lend rigidity to the construction and close the opposite ends ofthe shoe. Side flanges 85 extendalong the outer edges of the parts 88 between the ends 84. The shoe may be detachablyv mounted'on the band 18 by suitable means, say, by bolts 88 extending through the band vand through mounting flanges 89 at the ends of the shoe. TheY mounting flangcs89 continue inwardly from the end flanges 84-and have turned parts or feet fitting against the band and receiving bolts88 which connect the shoe to the inne side of the band 18.: l Y 4, The sections81 of the friction lining may be formed of any suitable material. A section 81 is arranged. on each part 88 of the shoe. These'ctions are preferably `.flat and are arranged on the parts 88 to engage the faces 26 of the groove 25 when the leverv is operatedto tighten the band on they flange 17. The sections 81 .preferably completely cover the inner sides vof the parts 88, extending between the flanges 84 and from the sideflanges 85 to the center of the base. Bolts or other suitable means 87 may extendy through the parts 88 to attach the sections 81 to the shoe. The bolts 87 may be countersunk in the lining sections 81 as illustrated in the drawing. The end flanges 84 and the side flanges 85 assist in maintaining the lining sections in their proper positions on the parts 88. The sections 81 project beyond the flanges 84 and'85 so that only the lining sections engage the flange 17 `whenthe lever 20 is actuated. lIt will be obvious that each shoe 19 may be provided with a unitary or continuous section of friction lining without departing from the spirit of the invention. C f

In Fig. 7 of the-drawing we have illustrated an arrangement. of the invention wherein the mounting flanges 89a of adjoining shoes 19 overlap each other. In this .form

of the inventionr each bolt 51 extends through the band 18 and through the flanges 89 at the adjoining ends of the two adjacent shoes.l

brought into pressure engagement with the faces 26. The shape of the groove 25 and the arrangement of the sections 31 on the shoes 19 are such that the pressure exerted through the sections 31 acts axially in the opposite directions as Well as inwardly or radially. Y The shoes 19 are always maintained in their proper positions as the band 18 cannot shift axially on the flange 17. The sections 31 are 1G particularly effective in gripping or engaging the ange 17 as they present an interrupted braking surface which does not b ecome smooth and inefficient. As the sections 31 become worn, the shoes 19 may be easily removed individually and the lining replaced on the shoes, or other shoes may be replaced on the band 18. The flange 17 is adapted to be mounted on the various formsof Winding drums in general use, and the 20 shoes 19 may be mounted onthe commonforrns of brake bands in place of the usual brake lining. It is to be noted that the brakeconstruction provided by this invention is eX- tremely inexpensive and is effective of operation.

Having described only a typical, preferred form of our invention, We do not Wish to limit ourselves to the specific details set forth, but` Wish to reserve to ourselves any changes or variations that may appear to those skilled in the art or fall Within the scope of the followin@ claims.

Ilaving described our invention, We claim:

1. A shoe to be mounted on a brake band including, a frame including convergent body parts7 brake lining on the body parts, side flanges on the body parts at the edges'of the lining and mounting flanges for the frame.

4o 2. A shoe to be mounted on a brake band including, a frame, convergent parts on the frame, lining on the said parts, end flanges on the parts, side flanges on the parts, the said side and end flanges operating to retain the lining on the said parts, and mounting flanges on the fra-me for mounting the frame on the band. Y

In Witness that We claim the foregoing We have hereunto subscribed our names.

WILLIAM ARTHUR VOCK.

CHARLES E. WOOD. 

